反应详情

温度

0 °C

To a solution of 1-bromopropan-2-ol (1.25 g, 9.0 mmol) and 3,4-dihydro-2H-pyran (2.04 ml, 22.5 mmol) in dichloromethane (50 ml) at 0° C. was added p-toluenesulfonic acid monohydrate (85 mg, 0.45 mmol). The reaction mixture was stirred at 0° C. for 15 min then warmed to room temperature and stirred for 2 h. The reaction was diluted with EtOAc and washed with water, sat NaHCO3, and brine then dried over MgSO4 and concentrated to afford 2-(2-bromo-1-methyl-ethoxy)-tetrahydro-2H-pyran as a light brown oil which was used without further purification.

1. temperaturethen warmed to room temperature
2. stirringstirred for 2 h
3. washwashed with water
4. dry with materialthen dried over MgSO4
5. concentrationconcentrated